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Pheromone antagonism in Plutella xylostella (Linnaeus) by sex pheromones of two sympatric noctuid moths

文献类型： 外文期刊

作者： Wang, Fu-Min 1 ; Shen, Zhi-Jie 1 ; Schal, Coby 3 ; Zhu, Junwei J. 5 ; Zhou, Guo-Xin 1 ; Wang, Yu-Lei 1 ; Wang, Ji-Rui; 1 ;

作者机构： 1.Zhejiang A&F Univ, Coll Adv Agr Sci, Dept Plant Protect, Wusu St, Hangzhou 311300, Zhejiang, Peoples R China

2.West Virginia Univ, Div Plant & Soil Sci, Morgantown, WV 26506 USA

3.North Carolina State Univ, Dept Entomol, Raleigh, NC USA

4.North Carolina State Univ, WM Keck Ctr Behav Biol, Raleigh, NC USA

5.USDA ARS, Agroecosyst Management Res Unit, Lincoln, NE USA

6.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai Key Lab Protected Hort Technol, Jinqi Rd, Shanghai 201403, Peoples R China

关键词： pheromone antagonism; antennal response; Plutella xyloslella; mating disruption; sympatry; semiochemical

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）

ISSN： 1526-498X

年卷期：

页码：

收录情况： SCI

摘要： BACKGROUND Responses to sex pheromones are commonly antagonized by pheromone components of closely related species. Pheromone antagonism has not been widely explored for phylogenetically distant species that have completely different pheromone components. Yet, pheromone components of sympatrically occurring species may also interfere with each other even if these species are distantly related. Here, the effects of heterospecific pheromones on electrophysiology (electroantennogram, EAG) and behavioral responses were tested on the diamondback moth Plutella xyloslella (Plutellidae) and two sympatric noctuid moth species, Spodoptera litura and Spodoptera exigua, whose larvae also feed on Brassica crops. RESULTS The sex pheromone blend of P. xyloslella, and its components, did not elicit EAG responses in males of the two noctuid species, while sex pheromone components of the noctuid moths elicited significant EAG responses in P. xyloslella males. In wind tunnel bioassays, both (Z, E)-9, 12-tetradecadienyl acetate (ZE-9,12-14:OAc) and (Z, E)-9, 11-tetradecadienyl acetate (ZE-9,11-14:OAc), sex pheromone components from the noctuid moths, inhibited the upwind flight behavior of P. xyloslella males toward an intraspecific pheromone odor source. In Brassica fields, sex pheromone lures of P. xyloslella did not influence trap catches of the noctuid moths, while P. xyloslella pheromone lures baited with either ZE-9,11-14:OAc or ZE-9,12-14:OAc decreased trap catches of P. xyloslella males in a dose-dependent manner. Trap catches of P. xylostella males were also affected by the proximity of ZE-9,11-14:OAc or ZE-9,12-14:OAc to P. xylostella lures. CONCLUSION The uni-directional pheromone antagonism by ZE-9,11-14:OAc and ZE-9,12-14:OAc suggests innovative semiochemical-based strategies for the management of P. xyloslella and other economically important pests in Brassica fields.

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